135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
/*
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* Copyright © 2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb.hh"
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#include "hb-open-type.hh"
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#include "hb-face.hh"
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#include "hb-aat-layout-common.hh"
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#include "hb-aat-layout-feat-table.hh"
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#include "hb-ot-layout-common.hh"
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#include "hb-ot-cmap-table.hh"
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#include "OT/Color/COLR/COLR.hh"
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#include "hb-ot-glyf-table.hh"
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#include "hb-ot-head-table.hh"
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#include "hb-ot-hmtx-table.hh"
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#include "hb-ot-maxp-table.hh"
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#ifndef HB_NO_VISIBILITY
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uint64_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
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/*thread_local*/ uint64_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
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DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF};
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DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) = {0xFF,0xFF,0xFF,0xFF};
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DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
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DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x01};
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DEFINE_NULL_NAMESPACE_BYTES (OT, ClipRecord) = {0x01};
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DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};
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DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};
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DEFINE_NULL_NAMESPACE_BYTES (AAT, Lookup) = {0xFF,0xFF};
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/* hb_map_t */
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const hb_codepoint_t minus_1 = -1;
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/* hb_face_t */
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#ifndef HB_NO_BEYOND_64K
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static inline unsigned
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load_num_glyphs_from_loca (const hb_face_t *face)
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{
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unsigned ret = 0;
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unsigned indexToLocFormat = face->table.head->indexToLocFormat;
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if (indexToLocFormat <= 1)
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{
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bool short_offset = 0 == indexToLocFormat;
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hb_blob_t *loca_blob = face->table.loca.get_blob ();
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ret = hb_max (1u, loca_blob->length / (short_offset ? 2 : 4)) - 1;
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}
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return ret;
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}
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#endif
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static inline unsigned
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load_num_glyphs_from_maxp (const hb_face_t *face)
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{
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return face->table.maxp->get_num_glyphs ();
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}
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unsigned int
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hb_face_t::load_num_glyphs () const
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{
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unsigned ret = 0;
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#ifndef HB_NO_BEYOND_64K
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ret = hb_max (ret, load_num_glyphs_from_loca (this));
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#endif
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ret = hb_max (ret, load_num_glyphs_from_maxp (this));
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num_glyphs = ret;
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return ret;
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}
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unsigned int
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hb_face_t::load_upem () const
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{
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unsigned int ret = table.head->get_upem ();
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upem = ret;
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return ret;
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}
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#ifndef HB_NO_VAR
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bool
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_glyf_get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical,
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int *lsb)
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{
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return font->face->table.glyf->get_leading_bearing_with_var_unscaled (font, glyph, is_vertical, lsb);
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}
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unsigned
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_glyf_get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical)
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{
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return font->face->table.glyf->get_advance_with_var_unscaled (font, glyph, is_vertical);
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}
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#endif
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bool
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_glyf_get_leading_bearing_without_var_unscaled (hb_face_t *face, hb_codepoint_t gid, bool is_vertical, int *lsb)
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{
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return face->table.glyf->get_leading_bearing_without_var_unscaled (gid, is_vertical, lsb);
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}
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#endif
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